I can't comment on the food at the restaurant, but the tour was fascinating. The smallest of William Wrigley's homes is still an amazing place to check out. You can walk around and see most of it for yourself, but it was nice to have a guide to give you some background about the house and the Wrigleys and Hormels.
The tour is $15 dollars a person, plus a $5 membership fee for the entire group. Not a horrible price for about an hour. There are also meal deals with the tour.